package com.sgj.utils;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * @author 沈国纪
 * @date 2021/3/30 13:45
 */
public class MD5Utils {

	/**
	 * MD5加密类
	 * @param str 要加密的字符串
	 * @return 加密后的字符串
	 */
	public static String code(String str) {
		try {
			MessageDigest md = MessageDigest.getInstance("MD5");
			md.update(str.getBytes());
			byte[] byteDigest = md.digest();
			int i;
			StringBuffer buf = new StringBuffer("");
			for (int offset = 0; offset < byteDigest.length; offset++) {
				i = byteDigest[offset];
				if (i < 0) {
					i += 256;
				}
				if (i < 16) {
					buf.append("0");
				}
				buf.append(Integer.toHexString(i));
			}
			// 32位加密
			return buf.toString();
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
			return null;
		}
	}
}
